net: lwip: build lwIP
Build the lwIP library when NET_LWIP is enabled. The following files
are adaptation layers written specially for U-Boot:
lib/lwip/u-boot/arch/cc.h
lib/lwip/u-boot/arch/sys_arch.h (empty)
lib/lwip/u-boot/limits.h (empty)
lib/lwip/u-boot/lwipopts.h
They were initially contributed by Maxim in a previous RFC patch series.
The lwIP stack needs to be added as a Git subtree with the following
command:
$ git subtree add --squash --prefix lib/lwip/lwip \
https://github.com/lwip-tcpip/lwip.git STABLE-2_2_0_RELEASE
Signed-off-by: Jerome Forissier <jerome.forissier@linaro.org>
Co-developed-by: Maxim Uvarov <muvarov@gmail.com>
Cc: Maxim Uvarov <muvarov@gmail.com>
Acked-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
diff --git a/lib/lwip/u-boot/arch/cc.h b/lib/lwip/u-boot/arch/cc.h
new file mode 100644
index 0000000..563d3bf
--- /dev/null
+++ b/lib/lwip/u-boot/arch/cc.h
@@ -0,0 +1,45 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright (C) 2023 Linaro Ltd. <maxim.uvarov@linaro.org> */
+
+#ifndef LWIP_ARCH_CC_H
+#define LWIP_ARCH_CC_H
+
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <vsprintf.h>
+#include <rand.h>
+
+#define LWIP_ERRNO_INCLUDE <errno.h>
+
+#define LWIP_ERRNO_STDINCLUDE 1
+#define LWIP_NO_UNISTD_H 1
+#define LWIP_TIMEVAL_PRIVATE 1
+
+#ifdef CONFIG_LIB_RAND
+#define LWIP_RAND() ((u32_t)rand())
+#else
+#define LWIP_DNS_SECURE 0
+#endif
+
+/* different handling for unit test, normally not needed */
+#ifdef LWIP_NOASSERT_ON_ERROR
+#define LWIP_ERROR(message, expression, handler) do { if (!(expression)) { \
+ handler; }} while (0)
+#endif
+
+#define LWIP_DONT_PROVIDE_BYTEORDER_FUNCTIONS
+
+#define LWIP_PLATFORM_ASSERT(x) do {printf("Assertion \"%s\" failed at line %d in %s\n", \
+ x, __LINE__, __FILE__); } while (0)
+
+#define atoi(str) (int)dectoul(str, NULL)
+#define lwip_strnstr(a, b, c) strstr(a, b)
+
+#define LWIP_ERR_T int
+#define LWIP_CONST_CAST(target_type, val) ((target_type)((uintptr_t)val))
+
+#if defined(CONFIG_SYS_BIG_ENDIAN)
+#define BYTE_ORDER BIG_ENDIAN
+#endif
+
+#endif /* LWIP_ARCH_CC_H */